Sales Order Page taking too long to load.

[mike_moorfield]

Hi all, I've got a customer site with 13,000 orders.  The invoice page loads in about a second or two but the Sales Order page either takes 20 mins to load or times out.  Has anyone got any pointers to help find what could be causing the issue?  There are no custom colums on the page, its Magento v1.9.4.1

Any help would be greatly appreciated!

[Vimal Kumar]

Hi @mike_moorfield,

May be any mysql query or block taking time to load.

You can check once after enabling profiler for this page and in network tab of browser to check that which request is taking much time.

Enable profiler:
how-to-enable-the-magento-profiler 

I hope it will help you!